留信app

Productivity

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Write an important letter in advance, encrypt it locally, and keep it ready for the people who matter. Liuxin helps you prepare important personal notes in advance. You can write a letter for family, friends, or trusted contacts, add recipient emails, and set a decryption password. Letter content is encrypted on the device before being saved to the server. The decryption password is not uploaded or stored on the server. When your configured trigger conditions are met in the future, Liuxin can enter a confirmation and delivery flow so important information has a better chance of reaching the right people. Useful for: - Important instructions for family - Account or document clues - Words you want to prepare for special situations - Personal arrangements you want to organize ahead of time Liuxin is not a will, legal document, medical service, emergency rescue service, financial service, or estate execution service. It is a secure preparation and reminder tool, not a replacement for professional legal documents or offline arrangements.

Ratings & Reviews

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The developer, Beijing Black & White Network Technology Co., Ltd., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Contact Info
    • User Content
    • Identifiers

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Beijing Black & White Network Technology Co., Ltd.
Size
  • 19.2 MB
Category
  • Productivity
Compatibility
Requires iOS 13.0 or later.
  • iPhone
    Requires iOS 13.0 or later.
  • iPod touch
    Requires iOS 13.0 or later.
  • Mac
    Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English and Simplified Chinese
Age Rating
4+
Copyright
  • © 2026 Linkin Black Or White
  • Privacy Policy

    • More by Beijing Black & White Network Technology Co., Ltd.